201721557

素因数分解:

$3^1\times {\mathrm{31}}^1\times {\mathrm{43}}^1\times {\mathrm{73}}^1\times {\mathrm{691}}^1$

素因数の和:841

約数の個数: 32

約数和(自身を含む): 288403456

約数和(自身を除く): 86681899

約数列:

[1, 3, 31, 43, 73, 93, 129, 219, 691, 1333, 2073, 2263, 3139, 3999, 6789, 9417, 21421, 29713, 50443, 64263, 89139, 97309, 151329, 291927, 921103, 1563733, 2169049, 2763309, 4691199, 6507147, 67240519, 201721557]

約数ペア:

[(1, 201721557), (3, 67240519), (31, 6507147), (43, 4691199), (73, 2763309), (93, 2169049), (129, 1563733), (219, 921103), (691, 291927), (1333, 151329), (2073, 97309), (2263, 89139), (3139, 64263), (3999, 50443), (6789, 29713), (9417, 21421)]